:root {
    --bg-deep: #060a13;
    --bg-card: #0c1220;
    --bg-card-hover: #111a2e;
    --bg-surface: #0a1019;
    --border: rgba(100, 160, 255, 0.07);
    --border-hover: rgba(100, 160, 255, 0.18);
    --blue: #3d8bfd;
    --blue-bright: #5ea3ff;
    --blue-glow: rgba(61, 139, 253, 0.15);
    --blue-glow-strong: rgba(61, 139, 253, 0.35);
    --text-primary: #e4e8f1;
    --text-secondary: #8892a8;
    --text-muted: #5a6478;
    --white: #f0f2f7;
    --font-display: 'Outfit', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --error: #ff6b6b;
    --success: #51cf66;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; overflow-x: hidden; }

  body {
    background: var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.75;
    overflow-x: hidden;
  }

  /* ===== GRAIN OVERLAY ===== */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
  }

  /* ===== SCROLL ANIMATIONS ===== */
  .fade-up {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .fade-up.in-view {
    opacity: 1;
    transform: translateY(0);
  }
  .fade-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .fade-left.in-view { opacity: 1; transform: translateX(0); }
  .fade-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .fade-right.in-view { opacity: 1; transform: translateX(0); }
  .d1 { transition-delay: 0.08s; }
  .d2 { transition-delay: 0.16s; }
  .d3 { transition-delay: 0.24s; }
  .d4 { transition-delay: 0.32s; }
  .d5 { transition-delay: 0.40s; }
  .d6 { transition-delay: 0.48s; }

  /* ===== SCROLL PROGRESS ===== */
  .progress-bar {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--blue-bright));
    z-index: 10001;
    box-shadow: 0 0 12px var(--blue-glow-strong);
  }

  /* ===== NAV ===== */
  header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 10000;
    padding: 0.9rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(6, 10, 19, 0.8);
    backdrop-filter: blur(24px) saturate(1.2);
    border-bottom: 1px solid var(--border);
    transition: padding 0.3s, background 0.3s;
  }
  header.compact {
    padding: 0.6rem 2.5rem;
    background: rgba(6, 10, 19, 0.95);
  }
  .nav-logo img {
    height: 64px;
    width: auto;
    display: block;
    transition: height 0.3s;
  }
  header.compact .nav-logo img {
    height: 42px;
  }
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 2.2rem;
    list-style: none;
  }
  .nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.88rem;
    letter-spacing: 0.5px;
    transition: color 0.25s;
  }
  .nav-menu a:hover { color: var(--blue-bright); }
  .nav-btn {
    background: var(--blue);
    color: var(--bg-deep) !important;
    padding: 0.55rem 1.6rem;
    border-radius: 6px;
    font-weight: 600 !important;
    transition: all 0.25s !important;
  }
  .nav-btn:hover {
    background: var(--blue-bright) !important;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--blue-glow);
  }

  /* Mobile menu */
  .mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
  }
  .mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-secondary);
    margin: 5px 0;
    transition: all 0.3s;
  }

  /* ===== HERO ===== */
  .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 5rem;
    position: relative;
    overflow: hidden;
  }
  /* Radial glow behind hero */
  .hero-glow {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 900px;
    height: 600px;
    background: radial-gradient(ellipse, var(--blue-glow) 0%, transparent 65%);
    pointer-events: none;
    animation: glowPulse 6s ease-in-out infinite alternate;
  }
  @keyframes glowPulse {
    0% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
  }
  /* Subtle grid */
  .hero-grid {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(61, 139, 253, 0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(61, 139, 253, 0.025) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black, transparent);
  }
  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 820px;
  }
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.82rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--blue-bright);
    background: rgba(61, 139, 253, 0.08);
    border: 1px solid rgba(61, 139, 253, 0.15);
    padding: 0.45rem 1.4rem;
    border-radius: 100px;
    margin-bottom: 2rem;
  }
  .hero-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--blue-bright);
    border-radius: 50%;
    animation: dotPulse 2s ease-in-out infinite;
  }
  @keyframes dotPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
  }
  .hero h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.6rem, 5.5vw, 4.5rem);
    line-height: 1.08;
    letter-spacing: -1.5px;
    color: var(--white);
    margin-bottom: 1.5rem;
  }
  .hero h1 .highlight {
    background: linear-gradient(135deg, var(--blue-bright), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
  }
  .hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
  }
  .btn-main {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    background: var(--blue);
    color: var(--bg-deep);
    padding: 0.9rem 2.2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
  }
  .btn-main:hover {
    background: var(--blue-bright);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px var(--blue-glow-strong);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 0.9rem 2rem;
    border: 1px solid var(--border-hover);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
    background: transparent;
    cursor: pointer;
  }
  .btn-outline:hover {
    color: var(--blue-bright);
    border-color: var(--blue);
    background: rgba(61, 139, 253, 0.05);
  }
  .btn-outline svg { transition: transform 0.3s; }
  .btn-outline:hover svg { transform: translateX(3px); }

  /* ===== CAPABILITIES STRIP ===== */
  .cap-strip {
    padding: 3.5rem 2rem;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
  }
  .cap-strip-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
  }
  .cap-item {
    text-align: center;
    padding: 1rem;
  }
  .cap-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(61, 139, 253, 0.06);
    border: 1px solid rgba(61, 139, 253, 0.1);
    border-radius: 10px;
  }
  .cap-icon svg { color: var(--blue); }
  .cap-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--white);
    margin-bottom: 0.25rem;
  }
  .cap-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
  }

  /* ===== SECTION UTILITY ===== */
  .section-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: 7rem 2rem;
  }
  .section-label {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 1rem;
  }
  .section-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.9rem, 3.5vw, 2.8rem);
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 0.8rem;
    letter-spacing: -0.5px;
  }
  .section-desc {
    color: var(--text-secondary);
    font-size: 1.08rem;
    max-width: 560px;
    line-height: 1.8;
  }

  /* ===== PROBLEM SECTION ===== */
  .problems {
    background: var(--bg-deep);
  }
  .problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem;
    margin-top: 3rem;
  }
  .problem-card {
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all 0.35s;
    position: relative;
    overflow: hidden;
  }
  .problem-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 0;
    background: var(--blue);
    border-radius: 0 0 3px 0;
    transition: height 0.4s;
  }
  .problem-card:hover::before { height: 100%; }
  .problem-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-3px);
  }
  .problem-emoji {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
    display: block;
  }
  .problem-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.75;
  }

  /* ===== SERVICES ===== */
  .services-bg {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
  }
  .svc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 2.5rem 2rem;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
  }
  .svc-card::after {
    content: '';
    position: absolute;
    top: -1px; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue), transparent);
    opacity: 0;
    transition: opacity 0.4s;
  }
  .svc-card:hover::after { opacity: 1; }
  .svc-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  }
  .svc-num {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 3.5rem;
    line-height: 1;
    background: linear-gradient(180deg, rgba(61, 139, 253, 0.18), rgba(61, 139, 253, 0.03));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.2rem;
  }
  .svc-card h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--white);
    margin-bottom: 0.8rem;
  }
  .svc-card p {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
  }
  .svc-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
  }
  .svc-tag {
    font-family: var(--font-display);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--blue);
    background: rgba(61, 139, 253, 0.07);
    border: 1px solid rgba(61, 139, 253, 0.12);
    padding: 0.25rem 0.7rem;
    border-radius: 4px;
  }

  /* ===== CASE STUDY ===== */
  .case-section {
    background: var(--bg-deep);
  }
  .case-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3.5rem;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
  }
  .case-card::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 350px; height: 350px;
    background: radial-gradient(circle, var(--blue-glow), transparent 65%);
    opacity: 0.4;
    pointer-events: none;
  }
  .case-metrics {
    position: relative;
    z-index: 2;
  }
  .case-metric {
    margin-bottom: 2.5rem;
  }
  .case-metric:last-child { margin-bottom: 0; }
  .case-val {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 3.2rem;
    line-height: 1;
    color: var(--blue-bright);
  }
  .case-lbl {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.78rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 0.3rem;
  }
  .case-body {
    position: relative;
    z-index: 2;
  }
  .case-body h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.8rem;
    color: var(--white);
    margin-bottom: 1.2rem;
    line-height: 1.25;
  }
  .case-body p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.85;
    margin-bottom: 1rem;
  }
  .case-footnote {
    color: var(--text-muted) !important;
    font-size: 0.9rem !important;
    font-style: italic;
    margin-top: 1.5rem !important;
  }

  /* ===== INDUSTRIES ===== */
  .industries-bg {
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .industries-bg .section-wrapper { text-align: center; }
  .industries-bg .section-desc { margin: 0 auto; }
  .ind-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
    margin-top: 2.5rem;
  }
  .ind-tag {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 0.8rem 1.8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.3s;
    cursor: default;
  }
  .ind-tag:hover {
    color: var(--blue-bright);
    border-color: var(--blue);
    background: rgba(61, 139, 253, 0.04);
    transform: translateY(-2px);
  }

  /* ===== FINAL CTA ===== */
  .final-cta {
    background: var(--bg-deep);
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  .final-cta::before {
    content: '';
    position: absolute;
    bottom: 20%; left: 50%;
    transform: translateX(-50%);
    width: 700px; height: 400px;
    background: radial-gradient(ellipse, var(--blue-glow), transparent 65%);
    opacity: 0.25;
    pointer-events: none;
  }
  .final-cta .section-wrapper {
    position: relative;
    z-index: 2;
    padding-top: 6rem;
    padding-bottom: 6rem;
  }
  .final-cta .section-heading {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 0.8rem;
  }
  .final-cta .section-desc {
    margin: 0 auto 2.5rem;
    text-align: center;
  }
  .final-cta .btn-main {
    font-size: 1.05rem;
    padding: 1rem 2.8rem;
  }

  /* ===== FOOTER ===== */
  footer {
    border-top: 1px solid var(--border);
    padding: 2.5rem;
  }
  .footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .footer-copy {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 0.82rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
  }
  .footer-links {
    display: flex;
    gap: 2rem;
  }
  .footer-links a {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.82rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.25s;
  }
  .footer-links a:hover { color: var(--blue-bright); }

  /* ===== RESPONSIVE ===== */
  @media (max-width: 900px) {
    .cap-strip-inner { grid-template-columns: repeat(3, 1fr); }
    .case-card { grid-template-columns: 1fr; gap: 2rem; padding: 2rem; }
  }
  @media (max-width: 900px) {
    .cap-strip-inner { grid-template-columns: repeat(3, 1fr); }
    .case-card { grid-template-columns: 1fr; gap: 2rem; padding: 2rem; }
  }
  @media (max-width: 640px) {
    header { padding: 0.8rem 1.2rem; }
    .nav-menu { display: none; }
    .mobile-toggle { display: block; }
    .hero { padding: 7rem 1.2rem 4rem; }
    .hero-actions { flex-direction: column; }
    .cap-strip-inner { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
    .section-wrapper { padding: 5rem 1.2rem; }
    .service-cards, .problem-grid { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
    .contact-page { padding: 7rem 1.2rem 3rem; }
    .form-card { padding: 2rem 1.5rem; }
    .form-row { grid-template-columns: 1fr; }
  }

/* ===== CONTACT PAGE ===== */
.contact-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 5rem;
  position: relative;
  overflow: hidden;
}
.contact-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse, var(--blue-glow) 0%, transparent 65%);
  pointer-events: none;
  opacity: 0.5;
}
.contact-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(61, 139, 253, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 139, 253, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, black, transparent);
}
.contact-container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 720px;
}

/* ===== FORM CARD ===== */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem;
  position: relative;
  overflow: hidden;
}
.form-card::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, var(--blue-glow), transparent 65%);
  opacity: 0.3;
  pointer-events: none;
}

/* ===== FORM FIELDS ===== */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  position: relative;
}
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.82rem;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.form-group label .required {
  color: var(--blue);
  margin-left: 2px;
}
.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1.1rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
  -webkit-appearance: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-glow);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238892a8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}
.form-group select option {
  background: var(--bg-card);
  color: var(--text-primary);
}
.form-group textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.7;
}

/* ===== SUBMIT BUTTON ===== */
.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  width: 100%;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  background: var(--blue);
  color: var(--bg-deep);
  padding: 1rem 2.2rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 0.5rem;
  position: relative;
  overflow: hidden;
}
.btn-submit:hover {
  background: var(--blue-bright);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--blue-glow-strong);
}
.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-submit .spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--bg-deep);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
.btn-submit.loading .btn-text,
.btn-submit.loading .btn-arrow { display: none; }
.btn-submit.loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== FORM STATUS ===== */
.form-status {
  text-align: center;
  padding: 1.2rem;
  border-radius: 10px;
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  display: none;
}
.form-status.success {
  display: block;
  background: rgba(81, 207, 102, 0.08);
  border: 1px solid rgba(81, 207, 102, 0.2);
  color: var(--success);
}
.form-status.error {
  display: block;
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.2);
  color: var(--error);
}

/* ===== BACK LINK ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-top: 2rem;
  transition: color 0.25s;
}
.back-link:hover { color: var(--blue-bright); }
.back-link svg { transition: transform 0.3s; }
.back-link:hover svg { transform: translateX(-3px); }

/* ===== NAV DROPDOWN ===== */
.nav-dropdown {
  position: relative;
}
.nav-dropdown > a {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  padding-top: 0.8rem;
  left: 0;
  background: rgba(6, 10, 19, 0.97);
  border: 1px solid var(--border-hover);
  border-radius: 10px;
  padding: 0.5rem;
  min-width: 280px;
  z-index: 999;
  backdrop-filter: blur(24px);
}
.nav-dropdown:hover .dropdown-menu {
  display: block;
}
.dropdown-menu a {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem !important;
  color: var(--text-secondary) !important;
  transition: all 0.2s;
}
.dropdown-menu a:hover {
  background: rgba(61, 139, 253, 0.08);
  color: var(--blue-bright) !important;
}
.dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 0.4rem 0.5rem;
}
.dropdown-label {
  font-family: var(--font-display);
  font-size: 0.65rem !important;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted) !important;
  padding: 0.5rem 1rem 0.25rem !important;
  cursor: default;
}
.dropdown-label:hover {
  background: none !important;
  color: var(--text-muted) !important;
}

/* ===== SERVICE PAGE — SHARED ===== */
.page-hero {
  padding: 10rem 2rem 6rem;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.page-hero .hero-glow {
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 900px; height: 500px;
  background: radial-gradient(ellipse, var(--blue-glow) 0%, transparent 65%);
  pointer-events: none;
}
.page-hero .hero-grid {
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black, transparent);
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.breadcrumb a:hover { color: var(--blue-bright); }
.service-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1.2rem;
  display: block;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: -1.5px;
  color: var(--white);
  max-width: 780px;
  margin-bottom: 1.5rem;
}
.page-hero h1 .highlight {
  background: linear-gradient(135deg, var(--blue-bright), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.85;
  margin-bottom: 2rem;
}
.hero-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}
.stack-tag {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(61, 139, 253, 0.07);
  border: 1px solid rgba(61, 139, 253, 0.15);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }

/* ===== PROSE ===== */
.prose { color: var(--text-secondary); font-size: 1.02rem; line-height: 1.9; max-width: 720px; }
.prose p { margin-bottom: 1.4rem; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--text-primary); font-weight: 500; }

/* ===== EXPLAINER SECTION ===== */
.explainer-bg {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.explainer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

/* ===== COMPARISON TABLE ===== */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 3rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
}
.compare-table th {
  text-align: left;
  padding: 0.9rem 1.2rem;
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.compare-table td {
  padding: 1rem 1.2rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table .col-label { color: var(--white); font-weight: 500; }
.compare-table .col-good { color: var(--success); }
.compare-table .col-bad { color: var(--error); }

/* ===== BUILD CARDS ===== */
.build-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}
.build-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.build-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--blue);
  transition: height 0.4s;
}
.build-card:hover::before { height: 100%; }
.build-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.build-icon {
  width: 40px; height: 40px;
  background: rgba(61, 139, 253, 0.06);
  border: 1px solid rgba(61, 139, 253, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--blue);
}
.build-card h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.5rem;
}
.build-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* ===== PROCESS STEPS ===== */
.process-steps { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 3rem; }
.process-step { display: grid; grid-template-columns: 48px 1fr; gap: 1.25rem; align-items: start; }
.step-num {
  width: 48px; height: 48px;
  background: rgba(61, 139, 253, 0.08);
  border: 1px solid rgba(61, 139, 253, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--blue);
  flex-shrink: 0;
}
.step-body h4 { font-family: var(--font-display); font-weight: 600; font-size: 1rem; color: var(--white); margin-bottom: 0.3rem; }
.step-body p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }

/* ===== TECH STACK ===== */
.stack-section { background: var(--bg-deep); }
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}
.stack-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}
.stack-group-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1rem;
}
.stack-items { display: flex; flex-direction: column; gap: 0.5rem; }
.stack-item {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.stack-item::before {
  content: '';
  width: 4px; height: 4px;
  background: var(--blue);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== SERVICE PAGE RESPONSIVE ===== */
@media (max-width: 900px) {
  .explainer-grid { grid-template-columns: 1fr; gap: 3rem; }
}
@media (max-width: 640px) {
  .page-hero { padding: 8rem 1.2rem 4rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

/* ===== SYMPTOM CARDS (data-engineering page) ===== */
.symptoms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}
.symptom-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.symptom-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--blue);
  transition: height 0.4s;
}
.symptom-card:hover::before { height: 100%; }
.symptom-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-3px); }
.symptom-icon { font-size: 1.4rem; margin-bottom: 0.8rem; display: block; }
.symptom-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 0.95rem; color: var(--white); margin-bottom: 0.4rem; }
.symptom-card p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.7; }

/* ===== ARCHITECTURE DIAGRAMS ===== */
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 100%;
  overflow-x: auto;
}
.arch-diagram-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: nowrap;
  min-width: fit-content;
}
.arch-diagram-flow.vertical {
  flex-direction: column;
}
.arch-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem 1.2rem;
  background: rgba(61, 139, 253, 0.04);
  border: 1px solid rgba(61, 139, 253, 0.15);
  border-radius: 10px;
  min-width: 90px;
  text-align: center;
  flex-shrink: 0;
}
.arch-node.highlight {
  background: rgba(61, 139, 253, 0.1);
  border-color: rgba(61, 139, 253, 0.35);
  box-shadow: 0 0 20px rgba(61, 139, 253, 0.08);
}
.arch-node-icon {
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
}
.arch-node-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.5px;
  color: var(--white);
  white-space: nowrap;
}
.arch-node-sub {
  font-family: var(--font-display);
  font-size: 0.62rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.arch-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(61, 139, 253, 0.4);
  flex-shrink: 0;
  padding: 0 0.3rem;
}
.arch-arrow.down {
  transform: rotate(90deg);
  padding: 0.3rem 0;
}
.arch-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.arch-group-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.6rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--blue);
}
.arch-group-items {
  display: flex;
  gap: 0.6rem;
}
.arch-group-items.vertical {
  flex-direction: column;
}
.arch-bracket {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 1.2rem;
  border: 1px dashed rgba(61, 139, 253, 0.15);
  border-radius: 12px;
  background: rgba(61, 139, 253, 0.02);
}
.arch-bracket-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.6rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.2rem;
}
.arch-divider {
  width: 1px;
  height: 40px;
  background: rgba(61, 139, 253, 0.15);
  flex-shrink: 0;
  margin: 0 1rem;
}
.arch-divider.horizontal {
  width: 40px;
  height: 1px;
  margin: 1rem 0;
}
@media (max-width: 640px) {
  .arch-diagram { padding: 1.5rem 1rem; }
  .arch-node { padding: 0.7rem 0.8rem; min-width: 70px; }
  .arch-node-label { font-size: 0.65rem; }
  .arch-node-sub { font-size: 0.55rem; }
  .arch-diagram-flow { gap: 0; }
  .arch-arrow { padding: 0 0.15rem; }
}